The CMMG Mk47 platform combines the strength of the Mk3 midsized receiver set with the ability to accept standard pattern AK47 magazines. The Mk47 platform is affectionately known as the Mutant! CMMG cracked the code combining the ergonomics of the AR-15 platform with the reliability of the AK47 platform. The Mid-size receiver which is carved from 7075-T6 Billet Aluminum with a hard coat anodized matte black finish. This upper includes a low profile gas block, along with a 13" 4140 barrel for exceptional accuracy. Finally the free float hand guard provides you with the modularity you need to mount all of your favorite accessories. Unleash the power with the CMMG Mk47 Mutant Complete Upper Assembly.